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Robert Castellano: Amazon KDP author data
As of Nov 6, 2026, Robert Castellano has 3 books on Amazon, 3 of them on a best-seller list in the last 30 days (best rank #43), mostly in Psychopharmacology, Pharmacology, Basic Sciences.
| Median price | $8.59 |
|---|---|
| Price range (middle 50%) | $8.29 – $8.59 |
| Median reviews | - |
| Total reviews | 0 |
| New books (30 days) | 3 |
| Breakout books (30 days) | 1 |
What stands out
- Median price $8.59, 77% below the median of their main category, Psychopharmacology.
- 3 new books in the last 30 days, 1 of them broke into a Best Sellers list.
Robert Castellano's best-ranked books
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Clinical Psychopharmacology Guide: Evidence-Based, Practical Medication Strategies for Anxiety, Depression, Bipolar Disorder, Psychosis, and More
by Robert Castellano
- Price$7.99
- Reviews-
-
Electronics for Beginners: A Hands-On Guide to Components, Circuits, and Simple Projects You Can Actually Build
by Robert Castellano
- Price$8.59
- Reviews-
-
Professional Wrestling: Inside the Ring, Behind the Curtain, and the Business That Built a Global Spectacle
by Robert Castellano
- Price$8.59
- Reviews-
Main categories
FAQ
How many books does Robert Castellano have on Amazon?
KDPTop tracks 3 of their books; 3 made an Amazon list in the last 30 days.
Which categories does Robert Castellano publish in?
Their books chart most often in Psychopharmacology, Pharmacology, Basic Sciences.
How does Robert Castellano price their books?
The median price is $8.59; half of the books cost $8.29–$8.59.
Has Robert Castellano released new books recently?
3 new books in the last 30 days, 1 of which reached a Best Sellers list.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.